queen game: ships fly home, wait at their portal, flash on bus events, and new cells come in batches #1550

Context

Slice 4 of the epic gHashTag/t27#7718, the game. The game should follow the card gHashTag/t27 specs/queen/hive.t27 (gHashTag/t27#7821), running as wasm.

Scenarios

• A ship whose bee left the feed flies back to the hive entrance and fades over DEPART_MS, instead of vanishing in one frame.
• A bee whose issue has no cell yet circles its repository's portal until the cell is placed.
• New cells are placed in batches. All of them come on the first answer, then at most one batch per CELL_BATCH_SECONDS. Each batch is one scene rebuild, instead of one rebuild per newly running issue.
• Each event of the Queen's bus flashes its cell:
  • gold for an acceptance;
  • amber for any other verdict;
  • red for a lost lease;
  • grey for a cancel;
  • white for a start.

Acceptance criteria

• public/t27/queen/hive.wasm is built from the card (t27c gen-c + zig 0.16.0, reproducible).
• data-scene-builds does not grow when a bee starts on an issue the map already holds, or when a bee finishes.
• The trinity type ratchet does not grow.